15.07% is the change from 670 to 771
Calculation steps:
[( 771 - 670 ) ÷ 670] x 100 = 15.07%
Formula
Percentage change = [(771 - 670) / 670] x 100
Subtract the new number by the original number
771 - 670 = 101
101 ÷ 670 = 0.15074626865671642
0.15074626865671642 x 100 = 15.07%